Incandescent-lamp cluster.



PATENTED NOV. 26,1907.

H. HUBBBLL.

INGANDBSGENT LAMP CLUSTER.

APPLICATION FILED 00T. 13, 1905.

2 SHEETS-SHEET 2.

INVENTOR WITNESSES fw- BY @fw/@Ma ATTORNEY HARVEYv HUBBELL, OFBRIDGEPORT, CONNECTICUT.

INCANDSCENT-LAMP CLUSTER.

Specification of Letters Patent.

Patented Nov. 2619() f Application filed October 13. 1905. Serial No.282.600.

To-laZZ whom it muy concern:

Be it known that I, HARVEY HUBBELL, a

l citizen of the United States, residing at Bridgeport, county ofFairfield, State of Connecticut, have invented a new and usefulIncandescent-Lamp Cluster, of 'which' the following is a specification.4

This invention has for its object to pi'oduce a simple and inexpensiveincandescent lamp cluster the body of' which shall be made entirely ofporcelain or other insulating material and shall be made in two arts,each the assembled position form sockets adapted to receive threadedsleeves which in turn receive the screw shells of incandescent lamps. Bymaking the body entirely of porcelain or similar material I am enabledto produce incandescent lamp clusters in which very littlemetal is usedand in which there are no exposed metallic parts and no opportunity forcorrosion, the cluster being very economical to produce, neat andsatisvide actoryin lappearance, easy and satisfactory to o crate andabsolutely safe under all the con itions of use. 4

With these and other objects in view I have devised the novel structureWhich I .will now describe referringto the accompanying drawings`forming a part of this speciiication and using reference characters toindicate the several parts.

vFigure 1 is a vertical section of my novelv cluster' on the line 1 1iniF ig. 2lillustrating -a form ofthe invention iii Which the lamps arein serr'es; Fig. 2 a larfview of the cluster detached from the hic rey,`Fig. 3 an invertedplan v iew of the upper part of the body oi -thecluster detached; Fig. 4 a similar view with the contacts, bindingscrews and threaded sleeves removed," and Fig.. 5 is aviewcorrespondingwith Fig. l, illustrating a form of the invention inwhich the lamps are in multiple.

10 and 1l denote the'parts';oi` the body which are ymolded frominsulating material, as porcelain, and are made of any requiredconfiguration. AThe parts are each pro- `With a plurality ofhalf-sockets l12 which are molded therein.. These halfsocliptscorrespond with each other and each pair of half-sockets form a socketto receive a threaded sleeve 37 which in turn tfo receive ,the screwshell 13 of anincandeseent lamp .14., Eachup er art ll() is showersrfvrlfled 0r ansssig part containing half sockets which in` is adapted4.e Awith iny terlocking projections 15 which interlock l withcorresponding depressions, not shown, in part 11l of the body to retainsaid parts accurately in position relatively to each other iiiassembling and in use. The parts of the body are secured together andthe cluster as a whole is secured to a hickey 21 by means of a centralbolt 22 threaded at both ends and engaged by nut 23 in the. hickey andan ornamental nut 24 on the underside of part l1 of the' body. Theliicliey is provided with lugs 52, see dotte'd lines Fig. 1, whichengage recesses 53 in the top of part 10 of the body. This constructioninsures a perfect fitting together of the parts in assembling and avoidsthe possibility of movement of the hickey relatively to the bod Withinthe body When the parts thereof are in the assembled position is arecessf/Z, part of said recess beingiormed in each portion of the bodyand projecting into this rees. is a hub 27 formed upon part 10 of theIii the series form of the invention, that is as illustrated in Figs. 1to .4 inclusive, the binding posts to which the circuit wires areattached are on the underside of part 10 of the body, while in themultiple forni, as illustrated in Fig. 5, the binding screws are on theupper side of part 10 of the body. In the latter form, 28 'denotes acontact plate which is secured to the hub and is adapted to be engagedby contactsl43 in the bases 29 of incandescent lamps. 30 denotescontacts shown as extending i'rom a ring which is secured to part 10 ofthe body at the upper end of recess 26. These contacts are rigidly4secured to threaded sleeves 37 and retain the sleeves in place, saidsleeves themselves being adapted to b'e engaged by the screw shells 13of incandescent lamps. 32 denotes binding screws 'for the circuit Wireswhichare shown as carried by plates 33 lying in a recess 34 in the topof part 10 of the body. One of the plates 33 is shown as `s ecured inplace by means of a screw 35 which also secures ring 31 in place, as atthe right in Fig. 5, the other plate 33 being Shownas secured in placeby means of a screw 36 which also secures contact plate 28 sage 'ofthecurrent in this form will be readily understood frm Fig. l5. Supposethat left plate 33.1 It .Willp'as'sby means of 'screw `in place, as atthe left in Fig, 1'. 'lhe pas` the current enters at the binding screwin the- '36 to contact plate 28, thence to the lamps through theengagement of the lamp bases with said plate. The current passes fromthe lamps through the enga ement of the screw shells with threadedseevesl 37 and theengagement of the latter with contacts 30 on ring 31,thence by means of screw 35 to the binding screw in the right plate 33.

In the'series form, see Figs. 1 to 4 inclusive, the circuit wiresindicated by 38 pass downward through holes 39 in part 10 of the bodyand are connected to binding screws 40 carried respectively by plates 41and 42. The threaded sleeves are riveted or otherwise secured, to plates44 which are themselves secured to part of the body and certain of whichare shown as connected by means of bridge plates 45. A46 denotescontacts which are adapted to be engaged by the contacts 43 in the basesof lamps. Certain of these contacts are connected by bridge plates 47which are secured to hub 27 and one of said contacts, see at the left inFig. 3, engages the plate 41 carrying one of the binding screws. Plate41 is secuied in place by a screw 48 which also aids in securing one ofthe bridge plates 47. Plate 42 is secured.:

ets which together forni sockets, threaded sage of the current is asfollows: Suppose that it enters by means of the circuit wire.

connected with the binding screw in iplate 41. The current passes bymeans o the plate 4,6 in contact with plate 41 to the con- ,tact 43 inthe base of a lamp ,thence through the screw shell of the lamp and thethreaded sleeve 37 at the left in Fig. 3 to thecorresponding plate 44andbridge plate 45 to another threaded sleeve; thence through a secondlam and by contact 43 to plate 46, through rid e plate 47 and anotherplate 46 to the threa ed sleeve and screwshell of a third lamp; thencethrough the contact 43, vplate 44, a bridge plate 45 and anotherl plate44 .to a threaded sleeve andthe screw shell of a fourth lamp; thence bymeans ,of a contact 43, a plate 46, bridge plate 47 and another plate 46to the contact 43 of' a iifth lamp; thence through the correspondingscrew shell and threaded sleeve to a plate 44; thence by means of screw51'to bridge plate 50 and by means of screw 49 to late 42, carrying thebinding screw to whic the other circuit wire is attached, said circuitwire passing upwardA through a hole 39 in part 10 of the body. y

In use, the lamps are attached and detached by turning them into and outot' the threaded sleeves 37 in the body, it being an important featureof the present vinvention that there are no parts to be insulated forthel reason that the entire body is madev of insulating material..

Having thus described my invention I claim:

A cluster for incandescent lamps comprisingltwo parts made of insulatingmate ial each aving formed therein half-sockets which with thecorresponding half-sockets of the other part form sockets, and threadedsleeves in said sockets which are adapted to receive the screw shells ofincandescent lamps.

2. A cluster for incandescent lamps coniprising a part made ofinsulating material and having half-sockets formedztherein and providedwith threaded sleeves for engagement by thev screw shells ofincandescent lamps and contacts for engagement by the bases ofincandescent lamps, and another part also formed of insulating materialand iaving half-sockets formed therein which with the correspondinghalf-sockets in thez sleeves in said sockets adapted to receive thescrew shells of incandescent lamps, one of said parts having contactsfor engagement by the bases of incandescent lamps.

4. An incandescent lamp cluster comprising two parts both I.formed frominsulating material and having corresponding half-sock.- ets whichtogether forni sockets, threaded sleeves in said sockets adapted toreceive the screw shells of incandescent lain s, said cluster having aninternal -recess an( within said recess contacts to engage the screwshells and other. contacts to engage the bases of incandescent lamps.

5. An incandescent lamp cluster consisting of-two corresponding )artsmade of insulating material cach part aving corresponding half-socketswhich together form sockets, threaded sleeves in said sockets adaptedtoreceive the screw shells of incandescentlanips, contacts to which thethreaded sleeves are attached, other contacts for engagement by thebases of incandescent lamps and meansdi'r securing the parts together.

6. An incandescent lanip cluster comprising two corresponding arts'madeof insulating material each art iaving corresponding half-sockets whicitogether forni sockets, threaded sleeves in said sockets adapted toreceive the screwl shells of incandescent lamps, contacts to which saidsleeves are attached, bridge plates connecting certain of said contacts,contacts adapted for engagement by thc baises ol"v incandescent lamps,bridge plates connecting certain of said contacts, binding screws towhich the circuit wires are attached and a bridge plate connected to oneoiE said binding screws and to a contact engaging a threaded sleeve andnot connected to a bridge ,late

7. An incandescent amp cluster comprising two parts both formed frominsulating material and having corresponding half-sockets which togetherform sockets, one of said parts being provided with recesses, threadedsleeves in said sockets adapted to receive the screw shells ofincandescent lamps, contacts engaging the threaded sleeves, othercontacts adapted for engagement by the bases of incandescent lamps, anda hickey to which said Aparts are'connected and which is provided withlugs engaging the recesses.

' 8. An incandescent lamp cluster comprisingotwo part-s both formed frominsulating material and having corresponding halt-sockets Whichtogetherform sockets, threaded sleeves in said sockets adapted to receive 'thesc rew shells of incandescent lamps, one of said parts being providedwith holes through which` the circuit wires pass and binding screws onits underside to which the circuit wires are connected and contactswhich engage the threaded sleeves and the bases of incandescent lamps.

t). An incandescent lamp cluster comprising two corresponding parts madeof insulating material each part having corresponding half-sockets whichtogether forni sockets, threaded sleeves in said sockets adapted toreceive the screw shells of incandescent lamps, contacts engagingrespectively the threaded sleeves and the bases of incandescent lampsand binding screws on the underside of one o1 the parts to which thecircuit wires are Connected and which are connected in series with thecontacts.

In testimony whereof l atlix in v signature, in presence of twowitnesses.

nAnvlcY HUBBELL.

Witnesses:

A. M. Woosfrnn,

S. W. A'rnicwroN.

